A process for preparing polymer-encapsulated dispersed non-monomer solids, such as, polymer-encapsulated pigments. Water, a pigment, a nonionic protective colloid or stabilizing agent, and a portion of a nonionic monomer having at least one monovalent unsaturated organo moiety are admixed. The pigment has a minimum of surface charge. A nonionic polymerization initiator is added to the admixture and the admixture is heated to begin the polymerization of the nonionic monomer. A nonionic catalyst and the remainder of the nonionic monomer are added to the admixture. The polymerization is allowed to proceed to finality or the desired degree. A polymer-encapsulated pigment dispersion is obtained.
一种制备聚合物包封分散非单体固体(如聚合物包封
颜料)的工艺。将
水、
颜料、非离子保护胶体或稳定剂以及部分具有至少一个单价不饱和有机分子的非离子单体混合在一起。
颜料的表面电荷最少。在混合物中加入非离子聚合
引发剂,然后加热混合物,使非离子单体开始聚合。在混合物中加入非离子催化剂和剩余的非离子单体。让聚合反应进行到最后或所需的程度。即可得到聚合物包覆
颜料分散体。